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For sale
  • $7,950,000

    42 Prospect Ave #23, Shelter Island Heights, NY 11965

    3beds
    4,133sqft
    Loading
    Single Family Residence
    Built in 2002
    3.41 Acres Lot
    $-- Zestimate®
    $1,924/sqft
    $-- HOA

    What's special

    Finnleo saunaWalk-in cedar closetProtective vegetative bufferAnodized aluminum windowsRadiant heat floorsHand-laid aluminum inlay mouldingsScreened dining area
    Built in 2002, "Treetops" is an AIA Archi Award-winning modern classic that boasts some of the most sweeping and unobstructed views on Eastern Long Island-stretching across the North Fork, Peconic Bay, Long Island Sound, and reaching to Connecticut. Positioned at 162 feet above sea level on "Divinity Hill" in Shelter Island Heights, it sits at one of the island's highest natural elevations. The home is the result of a thoughtful evolution of an original design by Peter Schladermundt, renowned for his iconic structures at the 1964 New York World's Fair, brought to its current form by noted architect Frederick Stelle. The architectural concept centers around two clean-lined volumes joined by a glass pavilion, using a restrained palette of stone, steel, and glass, executed with clarity and elegance. On the view-facing side of the home, a dramatic pavilion wrapped in 9-foot floor-to-ceiling glass walls provides unobstructed vistas. These are framed with anodized aluminum windows, hand-laid aluminum inlay mouldings, and solid core doors that reflect the home's refined craftsmanship. The main living area is open, featuring a fireplace, radiant heat floors, a screened dining area, and access to two decks, one with a built-in barbecue. An elevated kitchen is outfitted with Poliform cabinetry, high-end appliances, and a butler's pantry. Additional spaces on this level include a family room with Scandinavian fireplace, powder room, laundry, office/library, and a first-floor en-suite guest bedroom. A sculptural bluestone staircase, with treads subtly suspended one inch from a glass wall, rises beside 19-foot acid-etched glass windows, filtering natural light through the space, offering a graceful ascent to the primary en-suite bedroom. An aerie above the canopy of treetops, this suite features a covered rooftop terrace, steam shower, soaking tub, and a Scandinavian propane stove, offering a serene and secluded experience. The at-grade lower level includes recently installed travertine flooring, a guest bedroom with direct access to the pool area, a mirrored gym/exercise studio, Finnleo sauna, full bath, second laundry area, walk-in cedar closet, Eurocave 150-bottle wine cooler, and a Sub-Zero side-by-side refrigerator and freezer. Outdoors, a 57-foot heated freeform Gunite pool is bordered by Arizona buff stone and surrounded by lush perennial gardens. Pathways lead to a separate garden with multilevel bluestone decking and grandfathered steel cord railings, blending natural and architectural elements. As Hamptons Cottages & Gardens once wrote: "This place is indeed divine... not only in the sense of 'oh how divine,' but also in its distinctive sense of other-worldliness. Here the air, the light, the very atmosphere, feels celestial. Clouds floating by overhead appear within reach, and the sunsets are cinematic events." A rare Shelter Island offering, "Treetops" is as much a sanctuary as it is a landmark, complete with a protective vegetative buffer and unmatched architectural pedigree. Property taxes per annum as of 2025 are $22,194.
    109 days
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    255
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    17
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    Zillow last checked:

    Listing updated:

    Listed by:

    SAUNDERS & ASSOCIATES,

    Penelope Moore 917-208-5519

    Source: NY State MLS,MLS#: 11471713

      Facts & features

      Interior

      Bedrooms & bathrooms
      • Bedrooms: 3
      • Bathrooms: 4
      • Full bathrooms: 3
      • 1/2 bathrooms: 1
      Rooms
      • Room types: Bonus Room, Breakfast Room, Den, En Suite, Family Room, First Floor Bathroom, Great Room, Gym, Kitchen, Laundry Room, Living Room, Master Bedroom, Media Room, Private Guest Room, Study, Walk-in Closet
      Kitchen
      • Features: Pass-Through, Granite Counters
      Heating
      • Oil, Forced Air, Zoned, Radiant
      Cooling
      • Central, Zoned
      Appliances
      • Included: Dishwasher, Disposal, Dryer, Refrigerator, Microwave, Oven, Washer, Water Heater, Stainless Steel Appliances
      Features
      • Flooring: Hardwood, Granite, Stone
      • Basement: Full,Finished,Walk-Out Access
      • Number of fireplaces: 3
      • Fireplace features: Propane Stove
      Interior area
      • Total structure area: 4,133
      • Total interior livable area: 4,133 sqft
      • Finished area above ground: 4,133
      Video & virtual tour

      Property

      Parking
      • Parking features: Driveway
      • Has uncovered spaces: Yes
      Features
      • Stories: 3
      • Patio & porch: Patio, Covered Porch, Open Porch, Deck
      • Exterior features: Utilities
      • Pool features: Child Proof, Gunite, Heated, In Ground, Sauna
      • Fencing: Fenced
      • Has view: Yes
      • View description: Bay, Private, Scenic, Sound
      • Has water view: Yes
      • Water view: Bay,Sound
      • Frontage length: 0
      Lot
      • Size: 3.41 Acres
      • Features: Corner, Room For Tennis, Trees, Near Bus, Near Train
      Details
      • Parcel number: 0700006.00001000.010
      • Lease amount: $0

      Construction

      Type & style
      • Home type: SingleFamily
      • Architectural style: Modern
      • Property subtype: Single Family Residence
      Materials
      • Stone Siding, Stucco Siding, Wood Siding
      • Roof: Metal,Tar
      Condition
      • New construction: No
      • Year built: 2002

      Utilities & green energy

      • Electric: Amps(0)
      • Sewer: Private Septic
      • Water: Municipal

      Community & HOA

      Community
      • Features: Playground, Tennis Court
      • Security: Alarm, Fire Sprinkler System
      • Subdivision: Shelter Island Heights
      HOA
      • Has HOA: No
      • Amenities included: Playground, Tennis Court
      Location
      • Region: Shelter Island Heights

      Financial & listing details

      • Price per square foot: $1,924/sqft
      • Annual tax amount: $22,194
      • Date on market: 5/9/2026
      • Date available: 04/09/2025
      • Listing agreement: Exclusive

        Estimated market value

        Not available

        Estimated sales range

        Not available

        $6,711/mo

        Price history

        DateEventPrice
        5/9/2026Listed for sale$7,950,000$1,924/sqft
        Source: NY State MLS #11471713 Report a problem
        4/24/2026Listing removed$7,950,000$1,924/sqft
        Source: NY State MLS #11471713 Report a problem
        4/10/2025Listed for sale$7,950,000$1,924/sqft
        Source: NY State MLS #11471713 Report a problem

        Public tax history

        Tax history is unavailable.

        Monthly payment

        Estimated monthly payment$1,822
        All calculations are estimates and provided by Zillow, Inc. for informational purposes only. Actual amounts may vary.
        HOA fees may include property taxes on listings classified as Co-Ops. Contact the listing agent and/or owner for fee details.
        See how much you could borrow to make a competitive offer.

        Climate risks

        Neighborhood: 11965

        Getting around

        17 / 100
        Car-Dependent
        13 / 100
        Somewhat Bikeable

        Nearby schools

        GreatSchools rating

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